Graphophone and gramophone sound-box.



AfL. ROETHE. GRAPHOPHQNE AND GRAMOPHONE SOUND BOX. APPLICATION FILED DEO. 26, 1912;

1,1 l 3,911.' A Patented 001;. 1 3, 1914.

aLBEnrQL. Ron'rnn, or MILWAUKEE, wIscoNsIN.-

enaPEoPHoNii ,Aim eRAMoPHoNE SOUND-Box.

Specification. of `Letters Patent.

Patented oet. 13, 191g.

Application med December 26, 19121. Serial No. 738,718.V

To alli/whom it may concern.'

Be it known that L ALBERT L. RoE'rHn, a

citizen of the United States, and resident of Milwaukee, in the county of Milwaukee and State of llVisconsim have invented certain new and useful Improvements in Graphophone and Gramophone Sound-Boxes; and

. I do hereby declare thatftlhe following is 'a full, clear, and exact description thereof.

My invention consists in what is herein particularly set forth with reference to the accompanyin drawings and pointed out in the claims o this specification, its objects being to eliminate hissing noise in sound reproductions from graphophone and gramophone records and to improve the-tone of such reproductions by means of improved sound boxes to which my invention relates.

Figure i of the drawings represents a sectional View of one of my improved sound- 2; Fig. 2 of said drawings represents a side elevation' of the sound-box partly broken away; Fig. 3, a plan view of a detail of said sound-box artlv in horizontal sectionas AAindicated y line 3.--3

Fig. 1, and Fi 4, a partly sectional View of another deta1l of the aforesaid sound-box on the plane indicated by line 4-4 in Fig. 2.

Referrin by numerals to the drawings, 5 indicates tie centrally apertured diskof a graphophone or gramophone sound-box, em-

, bodylng my improvements, and 6 an attaching sleeve extending .from the outerr side of said disk o en to the said aperture. -Parallel to the disk' between insulating gaskets' 7 and 8 is the diaphragm 9 of the sound-box under the inwardly extending ange portion of a clamping ring 10 that is of right-'angle contour in cross-section and held in connection with' said disk by screws 11 that vextend through apertures in the diaphragm.

The disk and clamping ring together constitute the'diaphragm-casing and the construction and arran ement of all the several parts above', specified is similarto what is customaryl practice in the art" to which my invention'relates. Itis also customary rac- .vtice to attach the stylus-arms of graphop one and gramophone. sound boxes to the diahragm-casmgs thereof 'uninsulated therebom. An important novel feature of my improvedsound-boxjis .an insulation of its sty usfaf from the diaphragm-casin' and another important feature of said ox is socket-end `fork-branches being 'screws extending through my peculiar wayof attaching said arm to the diaplhragm. y By rt-her reference tothe drawings, it 1s to be noted that a ring12 of any suitable ring 10 of 4the sound-box. on which it is he d by a concentric clamping-band 13 having a flat faced outerlug 14 upon which to clamp a slotted and recessed spring-plate 15, the clamping-means being anv'outer bar' 16-held in'opposition to the plate by screws 17 engaging the lug of said bandlthe-plate-slots i60 1nsu1at1ng`material surrounds the clampm 4.-

aiording clearance for the screws and permit-ting adjustment of said plate. The of a,y stylus-arm 18 extends through the recess of the spring-plate 15 and is providedv .with oppositely extending 1 lateral wings 19 to which said plate is fs' tened by screws 20, the vibratlons of the said arm being regulated by adjustment of the aforesaid'plate between the band-lue` 14 and clampingbar 16. Thesocketend ciP the arm 18 yis provided with the usual set-screw 2l by which to; detachably hold a stylus 22 in engagement therewith, and the other end of .said arm is inturned. and forked, the

.in connection with' a` plate 23 attached to the diaphragm 9, oen- 'trally of the same, by ascrew 24, as best shown in Fig. 4,' upon an enlarged scale.

From the foregoing it 'is to be understood that the forked 'stylus-arm 18 is virtually a tuning-fork regulated as to pitch by the adjustment of the spring-plate to Whlch it is connected in insulatlon from the diaphr'agm casing of the sound box as a whole.

By having the stylus-arm of the sound` box yinsulated from thediaghragm-casng and said arm forked and o set from the. diaphragm immediately over thecenter of the same, the objects of myinvention are` attained.

I claim:

1. In a rapho hone or g'ramophone sound-box,' tde .com ination of a casin a. l

diaphragm insulated therein, a ring o .1nsulating material encompassing the casing, a clam in -band by which .the insulatin rin el in place and 'which is provide wit a -at faced outer lug, a recessed and slotted spring'- late facing th handling,

a bar opposing the spring-plate,A fastening t e bar and the spring-plate jslots into said banddug, a no stylus-,arm having'the, 'socketfend therg fastened tosad 'springfplate and exten A ring is hcl YVwith a-flat sulating. material encompassing through the recess of the same, the other end of the :i1-m being an inturned fo'i'k; and n plate connected with the fork branches sound-box, the combination of a casing, n diaphragm insulated therein, a

ring of inthe casing, insulating in place and which is provided faced outer lug, a recessed and slotted spring-plate'facing the band-lug, :i bar opposing the spring-plate, fastening screws extending through the bi1-r and the springplate slots into said band-lug, a stylus-arm having the socket-end thereof pro- :1 clamping-band by which the vided with appositi-ly extending lateral wings held hy screws in coi'incctmn with .mid spring-plate through the recess of which said end of the :mn extern-is, the other end nl: snifl :i1-m boing :in inwrned. fork; and n pluie connected with the slr branches of sinh( :mn :unl attached in said diaphragm.- ccntrully of thc same.

Tn testimony that I claim the foregoing hzifc hereunto my hand at Milwaukee in thc couny of Milwaukee and Siate of WiS- cmisin in the pix-)sence of two witnesses.

ALBERT L. RIHCHE.

fitness JOSEPH H. ANDR B. J. NOCKIN. 

